In this post, we’ll take a look at how you can quickly create an Azure Function when using a Mac. In particular, we’ll be using the Azure Functions command line tools to create our functions app.
Getting started
Before you can create a function, you’ll need to install the Azure Function command line tools. But before you can continue, you need to make sure that you have installed Brew. If you’re not familiar with it, Brew is a package manager for the Mac – similar to NPM for Node.Js projects.
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Once you’ve installed Brew, make sure you have the latest .NET Core SDK installed. If you’re not sure, open Terminal and run:
If you do get a version back, make sure it’s at least 2.0.0 or above. If you get an error, you’ll need to install it using the following Brew commands: Mac sierra 10.12.6 direct download link.
Run the same
dotnet version command again to ensure the install was successful.
Now we need to install the Azure Function Core Tools:
Once the install has finished, you’re now ready to go creating your first function!
Creating the function app
Now that we’ve got all the dependencies installed, it’s time to create our function app. Open Terminal, and navigate to a directory where you’d like your app to be created (in our case, we’re going to create it from the root Documents folder).
Now let’s get started creating the app! First lets initialise the project:
This will create a folder called
MyFirstFunctionApp inside your Documents folder. It will be initialised as a git repository (the source-control parameter) and have a dotnet runtime. If you’d prefer a Node.Js function or a Python function, you can replace dotnet with either node or python respectively.
You’ll now have your project – but at this point, it’ll be empty with no functions. To add your first function, we need to run the following command to generate a function called MyFirstFunction:
It’ll then ask you what type of template you’d like to use. A template is effectively a trigger – what will cause your function to start running? We’ll choose #2 (HttpTrigger) for now, as this will enable you to easily run your function via Curl, Postman or by visiting a page in your web browser. You can provide this in the previous command as
—template , or select from the list.
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You’ll now have your first function and function app created! You can run it by entering:
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Once it’s started, you should see the a message with the function URL, like this:
The sample function expects a name parameter to be provided, so open up your web browser and go to http://localhost:7071/api/MyFirstFunction?name=Bob. You should get a response like:
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So that’s how easy it is to get started with an Azure Function app on a Mac. Microsoft has done a lot of work around the tooling to make it as straightforward as possible.
Today I’m going to show you how to add a second NIC to an Azure Virtual Machine and how to change the MAC Address on your Azure Virtual Machine.
I had this requirement while automating the deployment of a component that is license locked to the MAC address of a NIC. In itself this is not a problem but combined with Azure and our deployment workflow it presented some challenges. As part of the deployment workflow the Azure VM is deleted and restored from a VHD image. Since this process creates a new VM and new NICs you also get a new MAC address every time which caused the license check to fail.
To avoid interfering with the normal operation of the networking in Azure I thought it best to add a second NIC on its own subnet and use it for the license while leaving the default NIC intact.
So the first step was to create a new subnet and to give it a different IP address range from the default NIC.
The second step is to add another NIC to the VM when you create it:
Add-AzureNetworkInterfaceConfig -Name 'LicenseNIC' -SubnetName 'License' -VM $NewVM
Thirdly there is the PowerShell script to change the MAC address when the new VM is created. Credit to Jason Fossen for the original script. This script is executed on the VM itself not against Azure. You can use Invoke-Command for instance as part of your deployment script to execute it remotely on the VM.
In the script I identify the NIC used for licencing based on it’s IP address 10.32.2.* and then I retrieve the index number for this NIC. This index is the same one used to find this NIC in the registry.
$indexobj = Get-WmiObject win32_networkadapterconfiguration -Filter 'ipenabled = 'true' | Where-Object {$_.IPAddress -like '10.32.2.*' } | Select-Object -Property Index
The registry key for the NIC always has four digits, so padleft, then get the key.
$index = $index.tostring().padleft(4,'0')
Set a new value for MAC address, in this case 30-D5-1E-DD-F2-A5.
$regpath = 'hklm:systemCurrentControlSetcontrolclass{4D36E972-E325-11CE-BFC1-08002BE10318}$index'
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If the NIC is not refreshed the new MAC address is not picked up by the licensing component we used. This may not be neccesary depending on your use case.
ipconfig.exe /release ''$($thenic.netconnectionid)'' | out-null
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How to download delta rune on a macbook pro. If you now look at your NIC properties you will see the new MAC address.
PS. On my Windows 10 machine it didn’t display properly on the NIC properties but you can use ipconfig /all to see the MAC address.
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December 2020
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